Recognition of digital modulation signals based on high-order cumulants

In communication countermeasure, in order to efficiently interfere with the enemy, firstly we need to determine the modulation mode of enemy signals. This paper introduces a recognition algorithm of digital modulation signals which based on high-order cumulants. Due to the signals of 8PSK and MFSK have the same cumulants, we can't recognize them directly. Meanwhile, the identify species of exiting method are few. So, in this paper a new method is proposed to solve the problems. The method not only has a high recognition ratio, but also it is simple and effective. And it can classify more modulation mode than exiting algorithm, including 2ASK/2PSK, 4ASK, 8ASK, 2FSK, 4FSK, 8FSK, 4PSK and 16QAM signals. The algorithm is verified by simulation results has better performance than the existing algorithm.